TRM (Thailand Reference Material) is a certified reference material issued by the National Institute of Metrology (Thailand), NIMT and its designated institute. TRM with a roof shape logo is a registered trademark of NIMT with the department of intellectual property, Thailand. TRMs are produced to the highest standards according to ISO Guide 34 ensuring their consistent quality. TRMs are produced with a well-defined traceability linkage to SI unit (Mole). The traceability is established via NIMT criteria using metrologically valid procedures for the certification of reference material given by NIMT.